1,4-Dioxane → HCID 86662053, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 3,5-dichloro-6-(1-hydroxy-1-methylethyl)pyrazine-2-carboxamide (1.10 g), 4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]-3-(trifluoromethyl)aniline (Preparation Example 436) (1.58 g), N,N-diisopropylethylamine (0.80 mL) and dioxane (31 mL) was stirred at 100° C. for 135 hours. After cooling, water was added, followed by extraction with ethyl acetate. Further, insoluble materials were separated by filtration, and the insoluble materials were dissolved in methanol and thereafter mixed with the organic layer. The solvent was distilled off under reduced pressure, followed by drying to give a brown solid. A mixture of the brown solid and acetic acid (30 mL) was stirred at 120° C. for 5 hours. After the solvent was distilled off, saturated aqueous sodium hydrogen carbonate was added, and the precipitated solid was collected by filtration and washed with water. The resulting solid was purified by basic silica gel column chromatography (eluent: chloroform) to give 5-chloro-6-isopropenyl-3-({4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]-3-(trifluoromethyl)phenyl}amino)pyrazine-2-carboxamide (0.99 g) as a yellow solid.

Provenance & Evidence